NPCMovementScriptDex

CC57 (both Red/Blue and Yellow) is wNPCMovementScriptPointerTableNum:

Red:
00: No effect
01: Fly away and freeze
02: ACE (C43A)
03: Freeze
04: Execute VRAM
05: Freeze
06: ACE (A000)
07: ACE (B8F0)
08: Execute VRAM
09: Freeze
0A: Taking one step may load a freezing Glitch City/Super Glitch City
0B: Freeze
0C: Freeze
0D: #5 ERROR forever
0E: Freeze
0F: Freeze
10: Cause copies of existing tiles of the screen as artefacts when walking right
11: Freeze
12: Freeze
13: Freeze
14: Walking around may cause freezes with influence on where you are
15: ACE (CC55)
16: Like 10
17: Like 10, 16
18: Freeze
19: Freeze
1A: Freeze
1B: Like 10, 16, 17
1C: Freeze
1D: Freeze
1E: Freeze
1F: Freeze
20: Freeze
21: Reset the game
22: Freeze
23: Freeze
24: Freeze
25: Freeze
26: ACE (CD70)
27: Freeze
28: Freeze
29: Freeze
2A: Disable A text boxes (including even PCs)
2B: Execute VRAM
2C: Like 2A. Sprite artefacts may occur
2D: Disable all joypad input
2E: Execute VRAM
2F: ACE (AF0E)
30: Freeze
31: Like 21
32: Freeze
33: ACE (EAD1)
34: [[Invalid opcode]] freeze (0xE3 at D:5177)/Freeze? (VC)
35: Freeze
36: ACE (E678)
37: Freeze
38: ACE (CD0F)
39: Freeze
3A: Like 2A, 2C
3B: Freeze
3C: ACE (D1B1) [*1]
3D: Freeze
3E: ACE (C3AF)
3F: Like/see 34
40: Like 2A, 2C, 3A
41: Freeze
42: ACE (D56F) [*2]
43: Freeze due to invalid opcode 0xD3 at 1600/seemingly nothing happens if ignored
44: Freeze
45: May either freeze or 'soft reset' the game after restarting taking a step can take you to a [[Glitch City]] and freeze the game
46: Unknown/seemingly nothing happens
47: Freeze
48: Freeze/A7 3D corruption pattern
49: Freeze
4A: ACE (EAD1)
4B: Freeze
4C: ACE (F5D5)
4D: Speeds up music slightly
4E: ACE (C126)
4F: View the first party Pokémon summary (glitched). This works if the party menu is unusable/you have no Pokémon too.
50: Walking lag glitch
51: ACE (CC24)
52: ACE (C100)
53: ACE (C421)
54: Freeze
55: ACE (F5D5)
56: Unknown/seemingly nothing happens
57: ACE (CFCD)
58: ACE (C8C8)
59: ACE (F5D5)
5A: Freeze
5B: ACE (CFCD)
5C: ACE (C8C8)
5D: ACE (F5D5)
5E: ACE (DA11)
5F: Freeze
60: ACE (F5D5)
61: ACE (C8C8)
62: ACE (C8C8)
63: ACE (CC55)
64: Unknown/seemingly nothing happens
65: Freeze
66: Freeze
67: Keep walking up on the spot, Fly away, cause ACE (C106). If ret, freeze.
68: Freeze
69: Warp to Route 10, lock up controls while playing glitch sounds. After a long time, ACE (DA20). If ret, blank out the screen and ACE (D7D1). There may be a way to have this not freeze the game, but it's unknown at this time.
6A: Unknown/seemingly nothing happens
6B: ACE (EF18)
6C: ACE (C459)
6D: Freeze
6E: ACE (CDAF)
6F: ACE (C981)
70: Freeze
71: Freeze
72: Freeze (3D A7 corruption pattern)
73: ACE (EA2A)
74: Unknown/seemingly nothing happens
75: Freeze
76: Freeze
77: Freeze
78: Freeze
79: Unknown/seemingly nothing happens
7A: Freeze (3D A7 corruption pattern)
7B: ACE (C6DA)
7C: Force open the Start menu or sometimes get a ##3 Error
7D: Freeze
7E: Unknown/seemingly nothing happens
7F: Freeze
80-FF (seem to be same as 00-7F): 
DD: ACE (F5D5) [*n]

*1: Party Pokémon 2 Special stat experience mod 256 
*2: PC item 27
*n: In Echo RAM copy of wMissableObjectList byte 8 (can be adjusted another means for permanence)

Yellow:
15: ACE (FA86) [*1]

*1: In stored Pokémon data (Pokémon 6)